Z-teca is BY FAR my favourite burrito in the city.
I care more about taste and variety than authenticity. The Pork Carnitas is my first pick but I always pick the meat that looks the freshest and juiciest, add some corn, rice, beans, sour cream, cheese and the Roasted Tomatillo & Jalapeno salsa and it's amazing!!
The portions are large and the price is reasonable. I only wish they had a smaller option for the times I'm not quite starving!